209Watering and Dust Palliatives

Watering and Dust Palliatives

Description

209.01. This work consists of applying water to soils or aggregates for moisture and density

control, landscaping, prewetting an excavation area, and dust palliatives. It also includes applying magnesium chloride dust palliative for the control of dust and the stabilization of soil and aggregate surfaced roads. Materials

209.02Water applied for moisture and density control, as dust palliative, and for prewetting

shall be free from injurious matter. Water for landscaping shall be free from oil, acids, alkalis, salts, or any substance injurious to plant life. When the water source proposed for use by the Contractor is not of known quality and chemical content, submit samples of the water for approval before use.

Magnesium chloride dust palliative shall consist of a magnesium chloride base agent, water, and other enhancing or nondetrimentalions. The chemical analysis shall conform to the following:

Table 209-1 Magnesium Chloride Dust Palliative Chemical Constituents Percent by Weight

Magnesium Chloride (MgCl2) 28 to 35 Enhancing or Non-detrimentalIons 0 to 5 Water 65 to 72

Construction Requirements

209.03Moisture and Density Control. Sprinkling equipment shall deliver uniform and

controlled distribution of water without ponding or washing. Apply uniformly water for finishing operations by spraying across the full width of the course.

209.04Prewetting. Prewetting material in excavation areas before its removal for placement

in embankments will be allowed when approved. The Contractor shall furnish a prewetting layout for each area to be prewetted including nozzle size, spacing, number of lines, and other equipment to be used. The Contractor shall obtain the approval of the Engineer for each prewetting layout before each prewetting operation.

209.05Dust Palliative. The Contractor shall furnish and apply a dust palliative on portions of

the roadway and on haul roads at the locations and in the amounts as provided in the Contract.

Dust palliative shall consist of water. Apply water with acceptable sprinkling equipment at an appropriate rate as approved by the Engineer.

Apply Magnesium Chloride dust palliative as follows:

209.06

Scarify the top 2 inches of the existing road surface and wet with water to approximately four percent moisture content, or as directed.

Apply the magnesium chloride dust palliative in two applications of 0.25 gallon per square yard in each application.

Allow to soak for 30 minutes after each application.

Roll the surface with a pneumatic tire roller, as specified in the Contract.

Do not permit traffic on the treated surface until approved.

209.06Landscaping. The Contractor shall furnish water for seeding, mulching, planting,

transplanting, sodding, herbicide treatment, and any other landscaping work when called for on the plans or when designated.

Method of Measurement

209.07Water will be measured by the number of thousand gallons (M Gallon) used and

accepted. Measurement of water may be made in the vehicle at point of delivery or by meter. When water is to be metered for measurement, the Contractor shall provide and use an approved metering device.

Magnesium Chloride dust palliative will be measured by the number of gallons applied and accepted.

Basis of Payment

209.08The accepted quantities of water measured as provided above will be paid for at the

contract unit price per M Gallon. The accepted quantities of Magnesium Chloride dust palliative measured as provided above will be paid for at the contract unit price per Gallon. Pay under:

Pay Item Pay Unit Water (M Gallon) Water (Landscaping) (M Gallon) Dust Palliative (Magnesium Chloride) Gallon

Water required for all items of work will not be measured and paid for separately but shall be included in the work, except that water for dust palliative, and water ordered for the benefit or safety of the public will be measured and paid for separately per the Contract.

If the area for landscape work is irrigated by a Department-owned system, the Contractor may use the water from this source. Water used from a Department source will not be measured and paid for.

210.01